John Delaney Books

Futurama: The Time-Bender Trilogy: A Futurama Graphic Novel

By Ian Boothby

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Futurama: The Time Bender Trilogy

By Matt Groening, Ian Boothby

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The crew of Planet Express are forced to go back to school, save the Earth from alien invaders, and rescue the entire population after it is sent back in time.

Simpsons comics

By Terry Delegeane

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VE DAY: THE ALBUM.

By Delaney John.

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VE Day: The Album - Photographs from the Imperial War Museum

By J. DELANEY, Delaney John Archivist

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The Practice of the Presence of God

By John J. Delaney

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Witchcraft

By Charles Williams

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.